1988 Volume 74 Issue 11 Pages 2090-2097
The dense wustite plates containing MgO with SiO2 or Al2O3 were reduced isothermally in H2 gas stream over a temperature range of 670 to 930°C.
By the presence of very small of SiO2 dissolved in wusuite phase the reduction reaction was promoted at temperatures above 800°C and retarded at temperatures below 730°C. MgO dissolved in FeO with SiO2 cancels the effect of SiO2 mentioned above.
Al2O3 dissolved in wustite slows down the reduction in initial stage greatly and that in and after middle stage further more. MgO dissolved in wustite with Al2O3 slows down the reduction in the initial stage further.
Correspondence between reduction rate and structure of reduced iron recognized in this work is same as that in previous works.
